ZIP code 94528: Diablo, CA
94528 is a ZIP code in Diablo, California, mainly in Contra Costa County, part of the San Francisco-Oakland-Fremont, CA metro area. About 1,049 people live here.
- Population
- 1,049
- Median household income
- $207,500
- Typical home value
- $3,107,100+3.9% in 12 months
- Median rent
- —gross, per month
- Median age
- 43
- Homeowners
- 100%of occupied homes
Shaded: ZIP code 94528's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 94528 details
| City | Diablo |
|---|---|
| State | California |
| County | Contra Costa County |
| Metro area | San Francisco-Oakland-Fremont, CA |
| Time zone | Pacific Time (UTC−8), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 1.2 sq mi |
| Population density | 912 people per sq mi |
| Bachelor's degree or higher | 79.8% of adults 25+ |
| Average commute | 41.8 minutes |
| Center coordinates | 37.84148, -121.95815 |
ZIP codes near 94528
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 94526 | Danville, CA | 2.3 mi | 32,584 |
| 94507 | Alamo, CA | 2.8 mi | 14,586 |
| 94506 | Danville, CA | 3.9 mi | 27,055 |
| 94570 | Moraga, CA | 4.4 mi | — |
| 94517 | Clayton, CA | 4.9 mi | 12,316 |
| 94583 | San Ramon, CA | 5.1 mi | 39,583 |
| 94596 | Walnut Creek, CA | 5.4 mi | 23,417 |
| 94582 | San Ramon, CA | 5.8 mi | 47,424 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Buying a home in 94528?
A typical home in ZIP code 94528 is worth about $3,107,100 (Zillow Home Value Index). The median household here earns $207,500 a year. See what buying here would cost per month, with California average taxes and insurance filled in.
Monthly payment for a $3,107,100 homeWhat can a $207,500 income afford?Rental property numbers
About ZIP code 94528
What city is ZIP code 94528?
ZIP code 94528 is in Diablo, CA, in Contra Costa County.
What county is ZIP code 94528 in?
94528 is mainly in Contra Costa County, California.
What is the population of ZIP code 94528?
About 1,049 people live in ZIP code 94528, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 94528 in?
94528 is in Pacific Time (UTC−8). It observes daylight saving time.